./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:35:43,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:35:43,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:35:44,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:35:44,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:35:44,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:35:44,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:35:44,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:35:44,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:35:44,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:35:44,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:35:44,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:35:44,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:35:44,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:35:44,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:35:44,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:35:44,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:35:44,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:35:44,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:35:44,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:35:44,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:35:44,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:35:44,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:35:44,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:35:44,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:35:44,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:35:44,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:35:44,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:35:44,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:35:44,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:35:44,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:35:44,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:35:44,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:35:44,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:35:44,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:35:44,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:35:44,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:35:44,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:35:44,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:35:44,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:35:44,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:35:44,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:35:44,139 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:35:44,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:35:44,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:35:44,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:35:44,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:35:44,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:35:44,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:35:44,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:35:44,143 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:35:44,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:35:44,144 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:35:44,144 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:35:44,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:35:44,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:35:44,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:35:44,145 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:35:44,145 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:35:44,145 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:35:44,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:35:44,146 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:35:44,146 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:35:44,146 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:35:44,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:35:44,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:35:44,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:35:44,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:35:44,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:35:44,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:35:44,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:35:44,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:35:44,148 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:35:44,149 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:35:44,149 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:35:44,149 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:35:44,149 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:35:44,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:35:44,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:35:44,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:35:44,484 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:35:44,485 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:35:44,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-30 06:35:45,641 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:35:45,868 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:35:45,869 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-30 06:35:45,879 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b210c560d/05ca014c79794359b0ba140a47fce9dd/FLAG4737cb30a [2023-08-30 06:35:45,902 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b210c560d/05ca014c79794359b0ba140a47fce9dd [2023-08-30 06:35:45,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:35:45,906 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:35:45,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:35:45,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:35:45,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:35:45,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:35:45" (1/1) ... [2023-08-30 06:35:45,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490d55e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:45, skipping insertion in model container [2023-08-30 06:35:45,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:35:45" (1/1) ... [2023-08-30 06:35:45,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:35:45,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:35:46,126 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2023-08-30 06:35:46,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:35:46,157 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:35:46,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29f78a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:46, skipping insertion in model container [2023-08-30 06:35:46,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:35:46,161 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:35:46,162 INFO L158 Benchmark]: Toolchain (without parser) took 255.21ms. Allocated memory is still 79.7MB. Free memory was 55.0MB in the beginning and 45.1MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:35:46,163 INFO L158 Benchmark]: CDTParser took 0.91ms. Allocated memory is still 58.7MB. Free memory was 36.5MB in the beginning and 36.5MB in the end (delta: 58.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:35:46,164 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.65ms. Allocated memory is still 79.7MB. Free memory was 54.8MB in the beginning and 45.3MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:35:46,166 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91ms. Allocated memory is still 58.7MB. Free memory was 36.5MB in the beginning and 36.5MB in the end (delta: 58.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.65ms. Allocated memory is still 79.7MB. Free memory was 54.8MB in the beginning and 45.3MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 104]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:35:47,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:35:47,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:35:47,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:35:47,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:35:47,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:35:47,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:35:47,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:35:47,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:35:47,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:35:47,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:35:47,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:35:47,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:35:47,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:35:47,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:35:48,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:35:48,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:35:48,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:35:48,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:35:48,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:35:48,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:35:48,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:35:48,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:35:48,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:35:48,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:35:48,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:35:48,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:35:48,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:35:48,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:35:48,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:35:48,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:35:48,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:35:48,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:35:48,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:35:48,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:35:48,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:35:48,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:35:48,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:35:48,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:35:48,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:35:48,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:35:48,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:35:48,074 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:35:48,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:35:48,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:35:48,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:35:48,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:35:48,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:35:48,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:35:48,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:35:48,078 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:35:48,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:35:48,079 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:35:48,079 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:35:48,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:35:48,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:35:48,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:35:48,080 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:35:48,080 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:35:48,080 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:35:48,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:35:48,080 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:35:48,080 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:35:48,081 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:35:48,081 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:35:48,081 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:35:48,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:35:48,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:35:48,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:35:48,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:35:48,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:35:48,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:35:48,083 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:35:48,083 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:35:48,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:35:48,083 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:35:48,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:35:48,084 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:35:48,084 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:35:48,084 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:35:48,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:35:48,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:35:48,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:35:48,450 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:35:48,450 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:35:48,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-30 06:35:49,539 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:35:49,748 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:35:49,749 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-30 06:35:49,755 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a68d4ef66/ed27947061884c3faef55bd68c94052c/FLAG420424c17 [2023-08-30 06:35:49,767 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a68d4ef66/ed27947061884c3faef55bd68c94052c [2023-08-30 06:35:49,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:35:49,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:35:49,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:35:49,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:35:49,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:35:49,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:35:49" (1/1) ... [2023-08-30 06:35:49,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4292637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:49, skipping insertion in model container [2023-08-30 06:35:49,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:35:49" (1/1) ... [2023-08-30 06:35:49,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:35:49,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:35:50,012 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2023-08-30 06:35:50,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:35:50,047 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:35:50,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:35:50,080 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2023-08-30 06:35:50,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:35:50,098 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:35:50,132 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2023-08-30 06:35:50,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:35:50,153 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:35:50,155 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:35:50,161 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:35:50,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50 WrapperNode [2023-08-30 06:35:50,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:35:50,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:35:50,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:35:50,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:35:50,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,223 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 188 [2023-08-30 06:35:50,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:35:50,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:35:50,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:35:50,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:35:50,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,303 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:35:50,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:35:50,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:35:50,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:35:50,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (1/1) ... [2023-08-30 06:35:50,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:35:50,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:35:50,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:35:50,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:35:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:35:50,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:35:50,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:35:50,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:35:50,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:35:50,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:35:50,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:35:50,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:35:50,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:35:50,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:35:50,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:35:50,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:35:50,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:35:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:35:50,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:35:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:35:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:35:50,389 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:35:50,500 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:35:50,502 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:35:50,990 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:35:51,198 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:35:51,198 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 06:35:51,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:35:51 BoogieIcfgContainer [2023-08-30 06:35:51,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:35:51,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:35:51,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:35:51,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:35:51,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:35:49" (1/3) ... [2023-08-30 06:35:51,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ac67c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:35:51, skipping insertion in model container [2023-08-30 06:35:51,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:35:50" (2/3) ... [2023-08-30 06:35:51,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ac67c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:35:51, skipping insertion in model container [2023-08-30 06:35:51,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:35:51" (3/3) ... [2023-08-30 06:35:51,209 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2023-08-30 06:35:51,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:35:51,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-08-30 06:35:51,224 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:35:51,308 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:35:51,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 165 transitions, 354 flow [2023-08-30 06:35:51,432 INFO L130 PetriNetUnfolder]: 12/162 cut-off events. [2023-08-30 06:35:51,433 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:35:51,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 162 events. 12/162 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-30 06:35:51,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 165 transitions, 354 flow [2023-08-30 06:35:51,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 158 transitions, 334 flow [2023-08-30 06:35:51,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:35:51,464 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 158 transitions, 334 flow [2023-08-30 06:35:51,466 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 158 transitions, 334 flow [2023-08-30 06:35:51,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 158 transitions, 334 flow [2023-08-30 06:35:51,492 INFO L130 PetriNetUnfolder]: 12/158 cut-off events. [2023-08-30 06:35:51,492 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:35:51,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 158 events. 12/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 174 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-30 06:35:51,495 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-08-30 06:36:10,158 INFO L134 LiptonReduction]: Checked pairs total: 2843 [2023-08-30 06:36:10,158 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-30 06:36:10,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:36:10,185 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5de409dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:36:10,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-08-30 06:36:10,188 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:36:10,188 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:36:10,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:10,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:36:10,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:10,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:10,194 INFO L85 PathProgramCache]: Analyzing trace with hash 24637, now seen corresponding path program 1 times [2023-08-30 06:36:10,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:10,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144875234] [2023-08-30 06:36:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:10,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:10,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:10,209 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:10,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:36:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:10,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:36:10,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:10,574 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:36:10,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:36:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:10,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:10,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:10,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144875234] [2023-08-30 06:36:10,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144875234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:10,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:10,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:36:10,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041059852] [2023-08-30 06:36:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:10,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:36:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:36:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:36:10,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-30 06:36:10,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:10,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:10,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-30 06:36:10,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:11,965 INFO L130 PetriNetUnfolder]: 5423/6918 cut-off events. [2023-08-30 06:36:11,966 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-08-30 06:36:11,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13966 conditions, 6918 events. 5423/6918 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 31474 event pairs, 2585 based on Foata normal form. 0/1869 useless extension candidates. Maximal degree in co-relation 5996. Up to 3433 conditions per place. [2023-08-30 06:36:12,014 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 06:36:12,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2023-08-30 06:36:12,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:36:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:36:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-30 06:36:12,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158974358974359 [2023-08-30 06:36:12,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-30 06:36:12,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-30 06:36:12,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:12,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-30 06:36:12,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:12,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:12,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:12,046 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 108 flow. Second operand 3 states and 503 transitions. [2023-08-30 06:36:12,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2023-08-30 06:36:12,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:36:12,058 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2023-08-30 06:36:12,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-30 06:36:12,063 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-08-30 06:36:12,063 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2023-08-30 06:36:12,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:12,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:12,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:36:12,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:12,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:12,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:12,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash 24694, now seen corresponding path program 1 times [2023-08-30 06:36:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:12,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353713901] [2023-08-30 06:36:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:12,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:12,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:12,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:12,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:36:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:12,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:36:12,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:12,438 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 06:36:12,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 06:36:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:12,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:12,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:12,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353713901] [2023-08-30 06:36:12,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353713901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:12,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:12,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:36:12,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074041097] [2023-08-30 06:36:12,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:12,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:36:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:36:12,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:36:12,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-30 06:36:12,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:12,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:12,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-30 06:36:12,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:13,493 INFO L130 PetriNetUnfolder]: 4283/5526 cut-off events. [2023-08-30 06:36:13,494 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 06:36:13,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11063 conditions, 5526 events. 4283/5526 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 24927 event pairs, 2038 based on Foata normal form. 0/1545 useless extension candidates. Maximal degree in co-relation 5529. Up to 5466 conditions per place. [2023-08-30 06:36:13,527 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 06:36:13,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 182 flow [2023-08-30 06:36:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:36:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:36:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 06:36:13,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728205128205128 [2023-08-30 06:36:13,531 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 06:36:13,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 06:36:13,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:13,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 06:36:13,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:13,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:13,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:13,537 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 461 transitions. [2023-08-30 06:36:13,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 182 flow [2023-08-30 06:36:13,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:36:13,538 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 102 flow [2023-08-30 06:36:13,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-30 06:36:13,539 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-08-30 06:36:13,539 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 102 flow [2023-08-30 06:36:13,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:13,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:13,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:36:13,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:13,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:13,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:13,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 24695, now seen corresponding path program 1 times [2023-08-30 06:36:13,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:13,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814798144] [2023-08-30 06:36:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:13,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:13,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:13,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:13,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:36:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:13,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:36:13,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:13,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:36:13,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:36:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:36:13,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:36:13,953 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 06:36:13,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 06:36:13,979 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:36:13,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:36:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:14,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:14,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:14,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814798144] [2023-08-30 06:36:14,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814798144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:14,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:14,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:36:14,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246410229] [2023-08-30 06:36:14,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:14,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:36:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:36:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:36:14,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 325 [2023-08-30 06:36:14,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:14,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:14,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 325 [2023-08-30 06:36:14,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:14,697 INFO L130 PetriNetUnfolder]: 3133/4124 cut-off events. [2023-08-30 06:36:14,698 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 06:36:14,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8259 conditions, 4124 events. 3133/4124 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 18796 event pairs, 1488 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 8251. Up to 4064 conditions per place. [2023-08-30 06:36:14,718 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 06:36:14,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 174 flow [2023-08-30 06:36:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:36:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:36:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-30 06:36:14,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47384615384615386 [2023-08-30 06:36:14,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-30 06:36:14,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-30 06:36:14,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:14,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-30 06:36:14,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:14,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:14,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:14,726 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 102 flow. Second operand 3 states and 462 transitions. [2023-08-30 06:36:14,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 174 flow [2023-08-30 06:36:14,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:36:14,728 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 99 flow [2023-08-30 06:36:14,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 06:36:14,729 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-30 06:36:14,729 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 99 flow [2023-08-30 06:36:14,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:14,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:14,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:36:14,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:14,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:14,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:14,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:14,941 INFO L85 PathProgramCache]: Analyzing trace with hash 24636, now seen corresponding path program 1 times [2023-08-30 06:36:14,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:14,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261390258] [2023-08-30 06:36:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:14,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:14,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:14,942 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:14,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:36:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:14,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:36:14,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:15,057 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:36:15,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:36:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:15,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:15,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:15,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261390258] [2023-08-30 06:36:15,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261390258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:15,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:15,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:36:15,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976695903] [2023-08-30 06:36:15,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:15,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:36:15,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:36:15,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:36:15,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-30 06:36:15,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:15,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:15,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-30 06:36:15,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:15,643 INFO L130 PetriNetUnfolder]: 3133/4122 cut-off events. [2023-08-30 06:36:15,643 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 06:36:15,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8256 conditions, 4122 events. 3133/4122 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 18721 event pairs, 1488 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 8247. Up to 4062 conditions per place. [2023-08-30 06:36:15,663 INFO L137 encePairwiseOnDemand]: 323/325 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 06:36:15,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 171 flow [2023-08-30 06:36:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:36:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:36:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-30 06:36:15,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687179487179487 [2023-08-30 06:36:15,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-30 06:36:15,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-30 06:36:15,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:15,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-30 06:36:15,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:15,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:15,671 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:15,671 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 99 flow. Second operand 3 states and 457 transitions. [2023-08-30 06:36:15,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 171 flow [2023-08-30 06:36:15,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:36:15,672 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 98 flow [2023-08-30 06:36:15,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-08-30 06:36:15,674 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-30 06:36:15,674 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 98 flow [2023-08-30 06:36:15,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:15,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:15,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:36:15,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 06:36:15,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:15,884 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:15,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:15,884 INFO L85 PathProgramCache]: Analyzing trace with hash 765816, now seen corresponding path program 1 times [2023-08-30 06:36:15,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:15,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650924008] [2023-08-30 06:36:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:15,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:15,886 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:15,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:36:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:36:15,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:16,072 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:36:16,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:36:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:16,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:36:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:16,330 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:16,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650924008] [2023-08-30 06:36:16,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650924008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:36:16,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:36:16,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:36:16,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708748870] [2023-08-30 06:36:16,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:36:16,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:36:16,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:16,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:36:16,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:36:16,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-08-30 06:36:16,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:16,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:16,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-08-30 06:36:16,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:17,907 INFO L130 PetriNetUnfolder]: 4681/6166 cut-off events. [2023-08-30 06:36:17,908 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 06:36:17,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12347 conditions, 6166 events. 4681/6166 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 29403 event pairs, 2226 based on Foata normal form. 0/1998 useless extension candidates. Maximal degree in co-relation 12337. Up to 2030 conditions per place. [2023-08-30 06:36:17,945 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 101 selfloop transitions, 7 changer transitions 0/111 dead transitions. [2023-08-30 06:36:17,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 111 transitions, 474 flow [2023-08-30 06:36:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:36:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:36:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 921 transitions. [2023-08-30 06:36:17,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723076923076923 [2023-08-30 06:36:17,949 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 921 transitions. [2023-08-30 06:36:17,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 921 transitions. [2023-08-30 06:36:17,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:17,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 921 transitions. [2023-08-30 06:36:17,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.5) internal successors, (921), 6 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:17,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:17,956 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:17,957 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 98 flow. Second operand 6 states and 921 transitions. [2023-08-30 06:36:17,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 111 transitions, 474 flow [2023-08-30 06:36:17,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 111 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:36:17,961 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 151 flow [2023-08-30 06:36:17,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-30 06:36:17,964 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-30 06:36:17,964 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 151 flow [2023-08-30 06:36:17,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:17,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:17,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:36:17,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:18,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:18,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:18,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:18,178 INFO L85 PathProgramCache]: Analyzing trace with hash 23748567, now seen corresponding path program 1 times [2023-08-30 06:36:18,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:18,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148463865] [2023-08-30 06:36:18,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:18,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:18,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:18,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:18,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:36:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:18,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:36:18,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:18,315 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:36:18,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 06:36:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:18,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:18,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:18,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148463865] [2023-08-30 06:36:18,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148463865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:18,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:18,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:36:18,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239512360] [2023-08-30 06:36:18,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:18,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:36:18,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:18,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:36:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:36:18,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-30 06:36:18,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:18,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:18,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-30 06:36:18,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:19,047 INFO L130 PetriNetUnfolder]: 4440/5835 cut-off events. [2023-08-30 06:36:19,047 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 06:36:19,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11713 conditions, 5835 events. 4440/5835 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 27722 event pairs, 2103 based on Foata normal form. 0/1884 useless extension candidates. Maximal degree in co-relation 11698. Up to 5745 conditions per place. [2023-08-30 06:36:19,079 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 06:36:19,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 227 flow [2023-08-30 06:36:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:36:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:36:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-30 06:36:19,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676923076923077 [2023-08-30 06:36:19,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-30 06:36:19,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-30 06:36:19,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:19,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-30 06:36:19,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:19,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:19,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:19,085 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 151 flow. Second operand 3 states and 456 transitions. [2023-08-30 06:36:19,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 227 flow [2023-08-30 06:36:19,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 43 transitions, 217 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 06:36:19,087 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 139 flow [2023-08-30 06:36:19,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-30 06:36:19,087 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-30 06:36:19,088 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 139 flow [2023-08-30 06:36:19,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:19,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:19,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:36:19,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:19,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:19,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:19,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:19,300 INFO L85 PathProgramCache]: Analyzing trace with hash 23748568, now seen corresponding path program 1 times [2023-08-30 06:36:19,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:19,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598746389] [2023-08-30 06:36:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:19,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:19,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:19,304 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:19,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:36:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:19,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:36:19,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:36:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:36:19,472 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 06:36:19,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 06:36:19,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-08-30 06:36:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:19,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:19,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598746389] [2023-08-30 06:36:19,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598746389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:19,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:19,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:36:19,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278873126] [2023-08-30 06:36:19,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:19,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:36:19,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:19,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:36:19,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:36:19,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 325 [2023-08-30 06:36:19,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:19,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:19,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 325 [2023-08-30 06:36:19,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:20,119 INFO L130 PetriNetUnfolder]: 4179/5484 cut-off events. [2023-08-30 06:36:20,119 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 06:36:20,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11008 conditions, 5484 events. 4179/5484 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 25819 event pairs, 1974 based on Foata normal form. 0/1821 useless extension candidates. Maximal degree in co-relation 10992. Up to 5394 conditions per place. [2023-08-30 06:36:20,150 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 06:36:20,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 41 transitions, 211 flow [2023-08-30 06:36:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:36:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:36:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-30 06:36:20,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687179487179487 [2023-08-30 06:36:20,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-30 06:36:20,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-30 06:36:20,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:20,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-30 06:36:20,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:20,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:20,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:20,156 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 139 flow. Second operand 3 states and 457 transitions. [2023-08-30 06:36:20,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 41 transitions, 211 flow [2023-08-30 06:36:20,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 41 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:36:20,159 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 136 flow [2023-08-30 06:36:20,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-30 06:36:20,160 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-30 06:36:20,160 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 136 flow [2023-08-30 06:36:20,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:20,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:20,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:36:20,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-30 06:36:20,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:20,369 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:20,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:20,370 INFO L85 PathProgramCache]: Analyzing trace with hash 736200986, now seen corresponding path program 1 times [2023-08-30 06:36:20,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:20,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487243247] [2023-08-30 06:36:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:20,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:20,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:20,371 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:20,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:36:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:20,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:36:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:20,534 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:36:20,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:36:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:20,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:20,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:20,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487243247] [2023-08-30 06:36:20,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487243247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:20,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:20,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:36:20,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299591568] [2023-08-30 06:36:20,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:20,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:36:20,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:20,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:36:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:36:20,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-08-30 06:36:20,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:20,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:20,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-08-30 06:36:20,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:21,506 INFO L130 PetriNetUnfolder]: 6348/8517 cut-off events. [2023-08-30 06:36:21,506 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 06:36:21,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17138 conditions, 8517 events. 6348/8517 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 44177 event pairs, 1608 based on Foata normal form. 0/3141 useless extension candidates. Maximal degree in co-relation 17121. Up to 4856 conditions per place. [2023-08-30 06:36:21,540 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 59 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2023-08-30 06:36:21,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 323 flow [2023-08-30 06:36:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:36:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:36:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 735 transitions. [2023-08-30 06:36:21,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523076923076923 [2023-08-30 06:36:21,544 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 735 transitions. [2023-08-30 06:36:21,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 735 transitions. [2023-08-30 06:36:21,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:21,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 735 transitions. [2023-08-30 06:36:21,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:21,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:21,548 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:21,548 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 136 flow. Second operand 5 states and 735 transitions. [2023-08-30 06:36:21,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 323 flow [2023-08-30 06:36:21,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:36:21,550 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 155 flow [2023-08-30 06:36:21,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2023-08-30 06:36:21,551 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-30 06:36:21,551 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 155 flow [2023-08-30 06:36:21,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:21,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:21,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:36:21,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-08-30 06:36:21,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:21,761 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:21,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:21,766 INFO L85 PathProgramCache]: Analyzing trace with hash 736200985, now seen corresponding path program 1 times [2023-08-30 06:36:21,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:21,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872806804] [2023-08-30 06:36:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:21,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:21,768 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:21,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:36:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:36:21,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:21,892 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:36:21,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:36:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:21,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:21,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:21,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872806804] [2023-08-30 06:36:21,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872806804] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:21,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:21,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:36:21,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154204756] [2023-08-30 06:36:21,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:21,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:36:21,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:21,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:36:21,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:36:22,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-08-30 06:36:22,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:22,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:22,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-08-30 06:36:22,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:22,500 INFO L130 PetriNetUnfolder]: 2646/3708 cut-off events. [2023-08-30 06:36:22,500 INFO L131 PetriNetUnfolder]: For 304/433 co-relation queries the response was YES. [2023-08-30 06:36:22,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8010 conditions, 3708 events. 2646/3708 cut-off events. For 304/433 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 18583 event pairs, 1431 based on Foata normal form. 129/2001 useless extension candidates. Maximal degree in co-relation 7991. Up to 3629 conditions per place. [2023-08-30 06:36:22,515 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 32 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2023-08-30 06:36:22,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 39 transitions, 221 flow [2023-08-30 06:36:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:36:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:36:22,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-08-30 06:36:22,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-08-30 06:36:22,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-08-30 06:36:22,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-08-30 06:36:22,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:22,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-08-30 06:36:22,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:22,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:22,523 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:22,523 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 155 flow. Second operand 4 states and 572 transitions. [2023-08-30 06:36:22,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 39 transitions, 221 flow [2023-08-30 06:36:22,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 211 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:36:22,525 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 147 flow [2023-08-30 06:36:22,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-08-30 06:36:22,526 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-30 06:36:22,526 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 147 flow [2023-08-30 06:36:22,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:22,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:22,527 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:36:22,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:22,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:22,735 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:22,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:22,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1341642493, now seen corresponding path program 2 times [2023-08-30 06:36:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:22,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741931768] [2023-08-30 06:36:22,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:36:22,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:22,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:22,737 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:22,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:36:22,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:36:22,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:36:22,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:36:22,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:22,919 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:36:22,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:36:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:23,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:36:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:23,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:23,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741931768] [2023-08-30 06:36:23,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741931768] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:36:23,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:36:23,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:36:23,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011450133] [2023-08-30 06:36:23,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:36:23,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:36:23,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:36:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:36:26,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 325 [2023-08-30 06:36:26,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 147 flow. Second operand has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:26,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:26,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 325 [2023-08-30 06:36:26,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:30,187 INFO L130 PetriNetUnfolder]: 8767/12299 cut-off events. [2023-08-30 06:36:30,187 INFO L131 PetriNetUnfolder]: For 999/1438 co-relation queries the response was YES. [2023-08-30 06:36:30,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26044 conditions, 12299 events. 8767/12299 cut-off events. For 999/1438 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 70412 event pairs, 4743 based on Foata normal form. 445/6867 useless extension candidates. Maximal degree in co-relation 26025. Up to 1420 conditions per place. [2023-08-30 06:36:30,230 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 272 selfloop transitions, 12 changer transitions 0/287 dead transitions. [2023-08-30 06:36:30,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 287 transitions, 1391 flow [2023-08-30 06:36:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:36:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:36:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1912 transitions. [2023-08-30 06:36:30,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49025641025641026 [2023-08-30 06:36:30,236 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1912 transitions. [2023-08-30 06:36:30,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1912 transitions. [2023-08-30 06:36:30,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:30,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1912 transitions. [2023-08-30 06:36:30,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.33333333333334) internal successors, (1912), 12 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:30,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 325.0) internal successors, (4225), 13 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:30,247 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 325.0) internal successors, (4225), 13 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:30,247 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 147 flow. Second operand 12 states and 1912 transitions. [2023-08-30 06:36:30,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 287 transitions, 1391 flow [2023-08-30 06:36:30,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 287 transitions, 1378 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:36:30,251 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 241 flow [2023-08-30 06:36:30,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=241, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2023-08-30 06:36:30,252 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-08-30 06:36:30,252 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 241 flow [2023-08-30 06:36:30,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:30,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:30,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:36:30,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:30,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:30,462 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:30,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:30,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1347553975, now seen corresponding path program 1 times [2023-08-30 06:36:30,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:30,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625340549] [2023-08-30 06:36:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:30,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:30,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:30,465 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:30,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:36:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:30,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:36:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:30,615 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-08-30 06:36:30,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2023-08-30 06:36:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:30,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:30,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625340549] [2023-08-30 06:36:30,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625340549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:30,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:30,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:36:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489090116] [2023-08-30 06:36:30,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:30,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:36:30,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:30,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:36:30,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:36:30,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 325 [2023-08-30 06:36:30,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:30,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:30,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 325 [2023-08-30 06:36:30,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:31,580 INFO L130 PetriNetUnfolder]: 8222/11474 cut-off events. [2023-08-30 06:36:31,580 INFO L131 PetriNetUnfolder]: For 912/1302 co-relation queries the response was YES. [2023-08-30 06:36:31,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24321 conditions, 11474 events. 8222/11474 cut-off events. For 912/1302 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 65021 event pairs, 4430 based on Foata normal form. 390/6314 useless extension candidates. Maximal degree in co-relation 24295. Up to 11234 conditions per place. [2023-08-30 06:36:31,638 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 06:36:31,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 44 transitions, 319 flow [2023-08-30 06:36:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:36:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:36:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-30 06:36:31,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512820512820513 [2023-08-30 06:36:31,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-30 06:36:31,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-30 06:36:31,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:31,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-30 06:36:31,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:31,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:31,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:31,642 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 241 flow. Second operand 3 states and 440 transitions. [2023-08-30 06:36:31,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 44 transitions, 319 flow [2023-08-30 06:36:31,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 44 transitions, 294 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 06:36:31,644 INFO L231 Difference]: Finished difference. Result has 64 places, 44 transitions, 214 flow [2023-08-30 06:36:31,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2023-08-30 06:36:31,645 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-30 06:36:31,645 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 214 flow [2023-08-30 06:36:31,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:31,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:31,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:36:31,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:31,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:31,853 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:31,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1347553976, now seen corresponding path program 1 times [2023-08-30 06:36:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:31,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561500812] [2023-08-30 06:36:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:31,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:31,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:31,856 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:31,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:36:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:31,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:36:31,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:31,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:36:32,016 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 06:36:32,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-30 06:36:32,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2023-08-30 06:36:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:32,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:32,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:32,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561500812] [2023-08-30 06:36:32,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561500812] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:32,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:32,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:36:32,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425462728] [2023-08-30 06:36:32,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:32,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:36:32,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:32,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:36:32,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:36:32,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 325 [2023-08-30 06:36:32,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:32,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:32,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 325 [2023-08-30 06:36:32,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:33,046 INFO L130 PetriNetUnfolder]: 7632/10604 cut-off events. [2023-08-30 06:36:33,046 INFO L131 PetriNetUnfolder]: For 838/1188 co-relation queries the response was YES. [2023-08-30 06:36:33,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22444 conditions, 10604 events. 7632/10604 cut-off events. For 838/1188 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 59078 event pairs, 4090 based on Foata normal form. 350/5974 useless extension candidates. Maximal degree in co-relation 22417. Up to 10364 conditions per place. [2023-08-30 06:36:33,082 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 06:36:33,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 42 transitions, 288 flow [2023-08-30 06:36:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:36:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:36:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-30 06:36:33,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-08-30 06:36:33,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-30 06:36:33,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-30 06:36:33,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:33,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-30 06:36:33,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:33,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:33,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:33,087 INFO L175 Difference]: Start difference. First operand has 64 places, 44 transitions, 214 flow. Second operand 3 states and 450 transitions. [2023-08-30 06:36:33,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 42 transitions, 288 flow [2023-08-30 06:36:33,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 42 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:36:33,089 INFO L231 Difference]: Finished difference. Result has 63 places, 42 transitions, 211 flow [2023-08-30 06:36:33,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=63, PETRI_TRANSITIONS=42} [2023-08-30 06:36:33,090 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2023-08-30 06:36:33,090 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 42 transitions, 211 flow [2023-08-30 06:36:33,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:33,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:33,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:36:33,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:33,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:33,297 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:33,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1347396625, now seen corresponding path program 1 times [2023-08-30 06:36:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:33,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847412114] [2023-08-30 06:36:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:33,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:33,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:33,299 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:33,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:36:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:33,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:36:33,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:33,469 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:36:33,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:36:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:33,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:33,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:33,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847412114] [2023-08-30 06:36:33,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847412114] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:33,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:33,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:36:33,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090465017] [2023-08-30 06:36:33,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:33,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:36:33,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:33,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:36:33,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:36:33,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-08-30 06:36:33,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 42 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:33,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:33,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-08-30 06:36:33,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:34,936 INFO L130 PetriNetUnfolder]: 8060/11214 cut-off events. [2023-08-30 06:36:34,937 INFO L131 PetriNetUnfolder]: For 1109/1109 co-relation queries the response was YES. [2023-08-30 06:36:34,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23955 conditions, 11214 events. 8060/11214 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 62059 event pairs, 4404 based on Foata normal form. 26/6339 useless extension candidates. Maximal degree in co-relation 23927. Up to 10733 conditions per place. [2023-08-30 06:36:34,971 INFO L137 encePairwiseOnDemand]: 318/325 looper letters, 64 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-30 06:36:34,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 70 transitions, 418 flow [2023-08-30 06:36:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:36:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:36:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 735 transitions. [2023-08-30 06:36:34,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523076923076923 [2023-08-30 06:36:34,973 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 735 transitions. [2023-08-30 06:36:34,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 735 transitions. [2023-08-30 06:36:34,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:34,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 735 transitions. [2023-08-30 06:36:34,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:34,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:34,977 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:34,977 INFO L175 Difference]: Start difference. First operand has 63 places, 42 transitions, 211 flow. Second operand 5 states and 735 transitions. [2023-08-30 06:36:34,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 70 transitions, 418 flow [2023-08-30 06:36:34,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:36:34,980 INFO L231 Difference]: Finished difference. Result has 69 places, 44 transitions, 249 flow [2023-08-30 06:36:34,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=69, PETRI_TRANSITIONS=44} [2023-08-30 06:36:34,981 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-30 06:36:34,981 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 44 transitions, 249 flow [2023-08-30 06:36:34,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:34,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:34,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:36:34,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-08-30 06:36:35,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:35,191 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:35,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:35,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1175503872, now seen corresponding path program 1 times [2023-08-30 06:36:35,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:35,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40876220] [2023-08-30 06:36:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:35,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:35,193 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:35,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:36:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:35,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:36:35,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:35,367 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:36:35,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:36:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:35,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:35,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:35,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40876220] [2023-08-30 06:36:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40876220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:35,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:35,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:36:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066979766] [2023-08-30 06:36:35,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:35,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:36:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:36:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:36:35,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 325 [2023-08-30 06:36:35,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 44 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:35,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:35,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 325 [2023-08-30 06:36:35,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:37,430 INFO L130 PetriNetUnfolder]: 11300/15840 cut-off events. [2023-08-30 06:36:37,430 INFO L131 PetriNetUnfolder]: For 10344/10849 co-relation queries the response was YES. [2023-08-30 06:36:37,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41480 conditions, 15840 events. 11300/15840 cut-off events. For 10344/10849 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 95665 event pairs, 4697 based on Foata normal form. 504/13019 useless extension candidates. Maximal degree in co-relation 41448. Up to 10233 conditions per place. [2023-08-30 06:36:37,520 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 51 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2023-08-30 06:36:37,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 62 transitions, 423 flow [2023-08-30 06:36:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:36:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:36:37,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 714 transitions. [2023-08-30 06:36:37,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393846153846154 [2023-08-30 06:36:37,522 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 714 transitions. [2023-08-30 06:36:37,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 714 transitions. [2023-08-30 06:36:37,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:37,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 714 transitions. [2023-08-30 06:36:37,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:37,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:37,526 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:37,526 INFO L175 Difference]: Start difference. First operand has 69 places, 44 transitions, 249 flow. Second operand 5 states and 714 transitions. [2023-08-30 06:36:37,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 62 transitions, 423 flow [2023-08-30 06:36:37,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 413 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 06:36:37,530 INFO L231 Difference]: Finished difference. Result has 72 places, 45 transitions, 267 flow [2023-08-30 06:36:37,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=72, PETRI_TRANSITIONS=45} [2023-08-30 06:36:37,531 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-08-30 06:36:37,531 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 45 transitions, 267 flow [2023-08-30 06:36:37,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:37,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:37,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:36:37,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:37,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:37,741 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:37,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:37,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1352999476, now seen corresponding path program 1 times [2023-08-30 06:36:37,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:37,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714472155] [2023-08-30 06:36:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:37,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:37,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:37,743 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:37,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:36:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:37,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:36:37,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:37,907 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:36:37,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:36:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:36:38,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:36:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:36:38,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:38,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714472155] [2023-08-30 06:36:38,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714472155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:36:38,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:36:38,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:36:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383194910] [2023-08-30 06:36:38,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:36:38,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:36:38,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:38,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:36:38,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:36:39,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 325 [2023-08-30 06:36:39,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 45 transitions, 267 flow. Second operand has 10 states, 10 states have (on average 134.4) internal successors, (1344), 10 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:39,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:39,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 325 [2023-08-30 06:36:39,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:42,768 INFO L130 PetriNetUnfolder]: 16800/23217 cut-off events. [2023-08-30 06:36:42,768 INFO L131 PetriNetUnfolder]: For 23348/25607 co-relation queries the response was YES. [2023-08-30 06:36:42,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64998 conditions, 23217 events. 16800/23217 cut-off events. For 23348/25607 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 145647 event pairs, 2153 based on Foata normal form. 2139/22212 useless extension candidates. Maximal degree in co-relation 64965. Up to 6057 conditions per place. [2023-08-30 06:36:42,934 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 96 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2023-08-30 06:36:42,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 112 transitions, 717 flow [2023-08-30 06:36:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:36:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:36:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1157 transitions. [2023-08-30 06:36:42,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2023-08-30 06:36:42,937 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1157 transitions. [2023-08-30 06:36:42,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1157 transitions. [2023-08-30 06:36:42,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:42,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1157 transitions. [2023-08-30 06:36:42,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.625) internal successors, (1157), 8 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:42,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:42,944 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:42,944 INFO L175 Difference]: Start difference. First operand has 72 places, 45 transitions, 267 flow. Second operand 8 states and 1157 transitions. [2023-08-30 06:36:42,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 112 transitions, 717 flow [2023-08-30 06:36:42,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 699 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:36:42,949 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 327 flow [2023-08-30 06:36:42,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2023-08-30 06:36:42,949 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 29 predicate places. [2023-08-30 06:36:42,949 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 327 flow [2023-08-30 06:36:42,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 134.4) internal successors, (1344), 10 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:42,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:42,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:36:42,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:43,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:43,165 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:43,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1293681852, now seen corresponding path program 1 times [2023-08-30 06:36:43,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:43,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506098517] [2023-08-30 06:36:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:43,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:43,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:43,167 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:43,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:36:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:36:43,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:43,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:36:43,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:36:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:36:43,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:36:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:36:43,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:43,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506098517] [2023-08-30 06:36:43,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506098517] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:36:43,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:36:43,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:36:43,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318747746] [2023-08-30 06:36:43,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:36:43,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:36:43,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:36:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:36:46,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 325 [2023-08-30 06:36:46,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 132.8) internal successors, (1328), 10 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:46,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:46,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 325 [2023-08-30 06:36:46,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:51,835 INFO L130 PetriNetUnfolder]: 34898/46998 cut-off events. [2023-08-30 06:36:51,835 INFO L131 PetriNetUnfolder]: For 70209/71264 co-relation queries the response was YES. [2023-08-30 06:36:52,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151260 conditions, 46998 events. 34898/46998 cut-off events. For 70209/71264 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 296523 event pairs, 5669 based on Foata normal form. 4321/46085 useless extension candidates. Maximal degree in co-relation 151223. Up to 12744 conditions per place. [2023-08-30 06:36:52,274 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 117 selfloop transitions, 13 changer transitions 0/133 dead transitions. [2023-08-30 06:36:52,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 995 flow [2023-08-30 06:36:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:36:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:36:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1137 transitions. [2023-08-30 06:36:52,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373076923076923 [2023-08-30 06:36:52,278 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1137 transitions. [2023-08-30 06:36:52,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1137 transitions. [2023-08-30 06:36:52,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:52,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1137 transitions. [2023-08-30 06:36:52,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.125) internal successors, (1137), 8 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:52,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:52,285 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:52,285 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 327 flow. Second operand 8 states and 1137 transitions. [2023-08-30 06:36:52,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 995 flow [2023-08-30 06:36:52,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 133 transitions, 941 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-30 06:36:52,337 INFO L231 Difference]: Finished difference. Result has 88 places, 55 transitions, 392 flow [2023-08-30 06:36:52,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=392, PETRI_PLACES=88, PETRI_TRANSITIONS=55} [2023-08-30 06:36:52,337 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 37 predicate places. [2023-08-30 06:36:52,337 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 55 transitions, 392 flow [2023-08-30 06:36:52,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.8) internal successors, (1328), 10 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:52,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:52,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:36:52,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:52,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:52,539 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:52,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash -78301802, now seen corresponding path program 1 times [2023-08-30 06:36:52,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:52,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521869921] [2023-08-30 06:36:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:52,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:52,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:52,541 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:52,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:36:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:52,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:36:52,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:52,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:36:52,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:52,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521869921] [2023-08-30 06:36:52,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521869921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:36:52,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:36:52,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:36:52,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084453864] [2023-08-30 06:36:52,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:36:52,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:36:52,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:52,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:36:52,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:36:52,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 325 [2023-08-30 06:36:52,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 55 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:52,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:36:52,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 325 [2023-08-30 06:36:52,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:36:57,510 INFO L130 PetriNetUnfolder]: 28139/39191 cut-off events. [2023-08-30 06:36:57,510 INFO L131 PetriNetUnfolder]: For 123215/127518 co-relation queries the response was YES. [2023-08-30 06:36:57,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147649 conditions, 39191 events. 28139/39191 cut-off events. For 123215/127518 co-relation queries the response was YES. Maximal size of possible extension queue 1269. Compared 236003 event pairs, 19691 based on Foata normal form. 4302/40943 useless extension candidates. Maximal degree in co-relation 147608. Up to 38858 conditions per place. [2023-08-30 06:36:58,049 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 71 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-30 06:36:58,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 78 transitions, 612 flow [2023-08-30 06:36:58,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:36:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:36:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 737 transitions. [2023-08-30 06:36:58,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45353846153846156 [2023-08-30 06:36:58,052 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 737 transitions. [2023-08-30 06:36:58,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 737 transitions. [2023-08-30 06:36:58,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:36:58,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 737 transitions. [2023-08-30 06:36:58,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:58,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:58,056 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:58,056 INFO L175 Difference]: Start difference. First operand has 88 places, 55 transitions, 392 flow. Second operand 5 states and 737 transitions. [2023-08-30 06:36:58,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 78 transitions, 612 flow [2023-08-30 06:36:58,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 595 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 06:36:58,148 INFO L231 Difference]: Finished difference. Result has 91 places, 56 transitions, 392 flow [2023-08-30 06:36:58,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=91, PETRI_TRANSITIONS=56} [2023-08-30 06:36:58,149 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 40 predicate places. [2023-08-30 06:36:58,149 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 56 transitions, 392 flow [2023-08-30 06:36:58,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:36:58,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:36:58,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:36:58,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:36:58,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:58,359 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:36:58,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:36:58,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1453874683, now seen corresponding path program 1 times [2023-08-30 06:36:58,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:36:58,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989620709] [2023-08-30 06:36:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:36:58,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:36:58,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:36:58,361 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:36:58,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:36:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:36:58,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:36:58,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:36:58,541 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:36:58,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:36:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:58,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:36:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:36:59,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:36:59,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989620709] [2023-08-30 06:36:59,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989620709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:36:59,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:36:59,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:36:59,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450572445] [2023-08-30 06:36:59,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:36:59,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:36:59,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:36:59,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:36:59,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:37:03,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 325 [2023-08-30 06:37:03,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 56 transitions, 392 flow. Second operand has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:03,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:37:03,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 325 [2023-08-30 06:37:03,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:37:11,165 INFO L130 PetriNetUnfolder]: 29193/40489 cut-off events. [2023-08-30 06:37:11,165 INFO L131 PetriNetUnfolder]: For 119360/123737 co-relation queries the response was YES. [2023-08-30 06:37:11,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152081 conditions, 40489 events. 29193/40489 cut-off events. For 119360/123737 co-relation queries the response was YES. Maximal size of possible extension queue 1317. Compared 245131 event pairs, 13907 based on Foata normal form. 5124/45355 useless extension candidates. Maximal degree in co-relation 152038. Up to 20281 conditions per place. [2023-08-30 06:37:11,571 INFO L137 encePairwiseOnDemand]: 317/325 looper letters, 196 selfloop transitions, 18 changer transitions 0/217 dead transitions. [2023-08-30 06:37:11,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 217 transitions, 1703 flow [2023-08-30 06:37:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 06:37:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 06:37:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1915 transitions. [2023-08-30 06:37:11,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208791208791209 [2023-08-30 06:37:11,578 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1915 transitions. [2023-08-30 06:37:11,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1915 transitions. [2023-08-30 06:37:11,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:37:11,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1915 transitions. [2023-08-30 06:37:11,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 136.78571428571428) internal successors, (1915), 14 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:11,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:11,587 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:11,588 INFO L175 Difference]: Start difference. First operand has 91 places, 56 transitions, 392 flow. Second operand 14 states and 1915 transitions. [2023-08-30 06:37:11,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 217 transitions, 1703 flow [2023-08-30 06:37:11,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 217 transitions, 1698 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:37:11,789 INFO L231 Difference]: Finished difference. Result has 106 places, 62 transitions, 478 flow [2023-08-30 06:37:11,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=478, PETRI_PLACES=106, PETRI_TRANSITIONS=62} [2023-08-30 06:37:11,789 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 55 predicate places. [2023-08-30 06:37:11,789 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 62 transitions, 478 flow [2023-08-30 06:37:11,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:11,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:37:11,790 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:37:11,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-08-30 06:37:11,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:37:11,990 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:37:11,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:37:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1063204671, now seen corresponding path program 2 times [2023-08-30 06:37:11,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:37:11,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658304457] [2023-08-30 06:37:11,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:37:11,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:37:11,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:37:11,992 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:37:11,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 06:37:12,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:37:12,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:37:12,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:37:12,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:37:12,175 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:37:12,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:37:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:37:12,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:37:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:37:13,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:37:13,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658304457] [2023-08-30 06:37:13,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658304457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:37:13,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:37:13,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:37:13,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581531552] [2023-08-30 06:37:13,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:37:13,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:37:13,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:37:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:37:13,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:37:20,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 325 [2023-08-30 06:37:20,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 62 transitions, 478 flow. Second operand has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:20,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:37:20,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 325 [2023-08-30 06:37:20,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:37:32,988 INFO L130 PetriNetUnfolder]: 31425/42833 cut-off events. [2023-08-30 06:37:32,988 INFO L131 PetriNetUnfolder]: For 155297/162220 co-relation queries the response was YES. [2023-08-30 06:37:33,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179906 conditions, 42833 events. 31425/42833 cut-off events. For 155297/162220 co-relation queries the response was YES. Maximal size of possible extension queue 1877. Compared 272237 event pairs, 8023 based on Foata normal form. 5711/48061 useless extension candidates. Maximal degree in co-relation 179859. Up to 14818 conditions per place. [2023-08-30 06:37:33,482 INFO L137 encePairwiseOnDemand]: 317/325 looper letters, 366 selfloop transitions, 27 changer transitions 0/398 dead transitions. [2023-08-30 06:37:33,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 398 transitions, 3218 flow [2023-08-30 06:37:33,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 06:37:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 06:37:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3066 transitions. [2023-08-30 06:37:33,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288111888111888 [2023-08-30 06:37:33,490 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3066 transitions. [2023-08-30 06:37:33,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3066 transitions. [2023-08-30 06:37:33,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:37:33,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3066 transitions. [2023-08-30 06:37:33,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 139.36363636363637) internal successors, (3066), 22 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:33,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 325.0) internal successors, (7475), 23 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:33,504 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 325.0) internal successors, (7475), 23 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:33,504 INFO L175 Difference]: Start difference. First operand has 106 places, 62 transitions, 478 flow. Second operand 22 states and 3066 transitions. [2023-08-30 06:37:33,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 398 transitions, 3218 flow [2023-08-30 06:37:33,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 398 transitions, 3158 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-30 06:37:33,819 INFO L231 Difference]: Finished difference. Result has 121 places, 79 transitions, 617 flow [2023-08-30 06:37:33,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=617, PETRI_PLACES=121, PETRI_TRANSITIONS=79} [2023-08-30 06:37:33,820 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2023-08-30 06:37:33,820 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 79 transitions, 617 flow [2023-08-30 06:37:33,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:33,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:37:33,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:37:33,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 06:37:34,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:37:34,031 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:37:34,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:37:34,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1368264792, now seen corresponding path program 1 times [2023-08-30 06:37:34,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:37:34,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618074159] [2023-08-30 06:37:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:37:34,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:37:34,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:37:34,032 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:37:34,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 06:37:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:37:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:37:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:37:34,374 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:37:34,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:37:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:37:34,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:37:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:37:36,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:37:36,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618074159] [2023-08-30 06:37:36,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618074159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:37:36,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:37:36,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 06:37:36,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392288429] [2023-08-30 06:37:36,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:37:36,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:37:36,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:37:36,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:37:36,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:37:44,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 325 [2023-08-30 06:37:44,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 79 transitions, 617 flow. Second operand has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:37:44,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:37:44,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 325 [2023-08-30 06:37:44,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:37:59,548 INFO L130 PetriNetUnfolder]: 36552/50332 cut-off events. [2023-08-30 06:37:59,548 INFO L131 PetriNetUnfolder]: For 202290/207962 co-relation queries the response was YES. [2023-08-30 06:37:59,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220240 conditions, 50332 events. 36552/50332 cut-off events. For 202290/207962 co-relation queries the response was YES. Maximal size of possible extension queue 1770. Compared 314379 event pairs, 13719 based on Foata normal form. 6137/56227 useless extension candidates. Maximal degree in co-relation 220193. Up to 13528 conditions per place. [2023-08-30 06:38:00,167 INFO L137 encePairwiseOnDemand]: 317/325 looper letters, 403 selfloop transitions, 37 changer transitions 0/445 dead transitions. [2023-08-30 06:38:00,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 445 transitions, 4001 flow [2023-08-30 06:38:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 06:38:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 06:38:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3138 transitions. [2023-08-30 06:38:00,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41979933110367895 [2023-08-30 06:38:00,173 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3138 transitions. [2023-08-30 06:38:00,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3138 transitions. [2023-08-30 06:38:00,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:38:00,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3138 transitions. [2023-08-30 06:38:00,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 136.43478260869566) internal successors, (3138), 23 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:00,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 325.0) internal successors, (7800), 24 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:00,185 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 325.0) internal successors, (7800), 24 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:00,185 INFO L175 Difference]: Start difference. First operand has 121 places, 79 transitions, 617 flow. Second operand 23 states and 3138 transitions. [2023-08-30 06:38:00,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 445 transitions, 4001 flow [2023-08-30 06:38:00,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 445 transitions, 3802 flow, removed 92 selfloop flow, removed 5 redundant places. [2023-08-30 06:38:00,643 INFO L231 Difference]: Finished difference. Result has 144 places, 98 transitions, 824 flow [2023-08-30 06:38:00,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=824, PETRI_PLACES=144, PETRI_TRANSITIONS=98} [2023-08-30 06:38:00,644 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2023-08-30 06:38:00,645 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 98 transitions, 824 flow [2023-08-30 06:38:00,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:00,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:38:00,645 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:38:00,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 06:38:00,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:38:00,856 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:38:00,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:38:00,856 INFO L85 PathProgramCache]: Analyzing trace with hash 940733725, now seen corresponding path program 3 times [2023-08-30 06:38:00,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:38:00,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276669350] [2023-08-30 06:38:00,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:38:00,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:38:00,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:38:00,857 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:38:00,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 06:38:01,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:38:01,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:38:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:38:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:38:01,108 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:38:01,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:38:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:38:01,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:38:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:38:03,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:38:03,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276669350] [2023-08-30 06:38:03,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276669350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:38:03,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:38:03,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:38:03,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394829535] [2023-08-30 06:38:03,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:38:03,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:38:03,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:38:03,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:38:03,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:38:15,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 325 [2023-08-30 06:38:15,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 98 transitions, 824 flow. Second operand has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:15,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:38:15,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 325 [2023-08-30 06:38:15,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:38:47,277 INFO L130 PetriNetUnfolder]: 75849/103092 cut-off events. [2023-08-30 06:38:47,277 INFO L131 PetriNetUnfolder]: For 685350/703533 co-relation queries the response was YES. [2023-08-30 06:38:48,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527494 conditions, 103092 events. 75849/103092 cut-off events. For 685350/703533 co-relation queries the response was YES. Maximal size of possible extension queue 2504. Compared 664603 event pairs, 47074 based on Foata normal form. 12412/114867 useless extension candidates. Maximal degree in co-relation 527440. Up to 27419 conditions per place. [2023-08-30 06:38:48,729 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 750 selfloop transitions, 24 changer transitions 0/785 dead transitions. [2023-08-30 06:38:48,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 785 transitions, 6972 flow [2023-08-30 06:38:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:38:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:38:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3777 transitions. [2023-08-30 06:38:48,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48423076923076924 [2023-08-30 06:38:48,735 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3777 transitions. [2023-08-30 06:38:48,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3777 transitions. [2023-08-30 06:38:48,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:38:48,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3777 transitions. [2023-08-30 06:38:48,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 157.375) internal successors, (3777), 24 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:48,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 325.0) internal successors, (8125), 25 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:48,746 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 325.0) internal successors, (8125), 25 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:48,746 INFO L175 Difference]: Start difference. First operand has 144 places, 98 transitions, 824 flow. Second operand 24 states and 3777 transitions. [2023-08-30 06:38:48,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 785 transitions, 6972 flow [2023-08-30 06:38:55,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 785 transitions, 6887 flow, removed 28 selfloop flow, removed 9 redundant places. [2023-08-30 06:38:55,914 INFO L231 Difference]: Finished difference. Result has 171 places, 111 transitions, 938 flow [2023-08-30 06:38:55,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=938, PETRI_PLACES=171, PETRI_TRANSITIONS=111} [2023-08-30 06:38:55,914 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2023-08-30 06:38:55,915 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 111 transitions, 938 flow [2023-08-30 06:38:55,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:38:55,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:38:55,915 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-30 06:38:55,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 06:38:56,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:38:56,116 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:38:56,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:38:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2142395825, now seen corresponding path program 3 times [2023-08-30 06:38:56,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:38:56,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278316955] [2023-08-30 06:38:56,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:38:56,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:38:56,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:38:56,118 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:38:56,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 06:38:56,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 06:38:56,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:38:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:38:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:38:56,460 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:38:56,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:38:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:38:56,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:38:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:38:57,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:38:57,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278316955] [2023-08-30 06:38:57,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278316955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:38:57,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:38:57,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 06:38:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775367492] [2023-08-30 06:38:57,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:38:57,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 06:38:57,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:38:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 06:38:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-30 06:39:10,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 325 [2023-08-30 06:39:10,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 111 transitions, 938 flow. Second operand has 21 states, 21 states have (on average 132.14285714285714) internal successors, (2775), 21 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:10,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:10,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 325 [2023-08-30 06:39:10,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:37,870 INFO L130 PetriNetUnfolder]: 81245/110531 cut-off events. [2023-08-30 06:39:37,870 INFO L131 PetriNetUnfolder]: For 713667/730534 co-relation queries the response was YES. [2023-08-30 06:39:39,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559228 conditions, 110531 events. 81245/110531 cut-off events. For 713667/730534 co-relation queries the response was YES. Maximal size of possible extension queue 2714. Compared 725465 event pairs, 39973 based on Foata normal form. 12758/121362 useless extension candidates. Maximal degree in co-relation 559163. Up to 81581 conditions per place. [2023-08-30 06:39:39,686 INFO L137 encePairwiseOnDemand]: 316/325 looper letters, 520 selfloop transitions, 48 changer transitions 0/575 dead transitions. [2023-08-30 06:39:39,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 575 transitions, 5014 flow [2023-08-30 06:39:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 06:39:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 06:39:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3617 transitions. [2023-08-30 06:39:39,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44516923076923076 [2023-08-30 06:39:39,691 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3617 transitions. [2023-08-30 06:39:39,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3617 transitions. [2023-08-30 06:39:39,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:39,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3617 transitions. [2023-08-30 06:39:39,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 144.68) internal successors, (3617), 25 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:39,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 325.0) internal successors, (8450), 26 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:39,700 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 325.0) internal successors, (8450), 26 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:39,700 INFO L175 Difference]: Start difference. First operand has 171 places, 111 transitions, 938 flow. Second operand 25 states and 3617 transitions. [2023-08-30 06:39:39,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 575 transitions, 5014 flow [2023-08-30 06:39:50,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 575 transitions, 4966 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 06:39:50,622 INFO L231 Difference]: Finished difference. Result has 194 places, 138 transitions, 1339 flow [2023-08-30 06:39:50,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1339, PETRI_PLACES=194, PETRI_TRANSITIONS=138} [2023-08-30 06:39:50,623 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 143 predicate places. [2023-08-30 06:39:50,623 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 138 transitions, 1339 flow [2023-08-30 06:39:50,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 132.14285714285714) internal successors, (2775), 21 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:50,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:50,624 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:39:50,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:39:50,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:50,825 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:39:50,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:50,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1336985445, now seen corresponding path program 2 times [2023-08-30 06:39:50,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:50,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628377066] [2023-08-30 06:39:50,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:39:50,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:50,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:50,827 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:39:50,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 06:39:50,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:39:50,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:39:50,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:39:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:51,076 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:39:51,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:39:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:51,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:39:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:52,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:52,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628377066] [2023-08-30 06:39:52,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628377066] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:39:52,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:39:52,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:39:52,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744915921] [2023-08-30 06:39:52,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:39:52,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 06:39:52,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 06:39:52,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-30 06:40:00,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 325 [2023-08-30 06:40:00,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 138 transitions, 1339 flow. Second operand has 17 states, 17 states have (on average 132.41176470588235) internal successors, (2251), 17 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:00,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:00,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 325 [2023-08-30 06:40:00,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:27,596 INFO L130 PetriNetUnfolder]: 91935/125106 cut-off events. [2023-08-30 06:40:27,596 INFO L131 PetriNetUnfolder]: For 1082214/1097059 co-relation queries the response was YES. [2023-08-30 06:40:29,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702607 conditions, 125106 events. 91935/125106 cut-off events. For 1082214/1097059 co-relation queries the response was YES. Maximal size of possible extension queue 3106. Compared 833546 event pairs, 50648 based on Foata normal form. 8041/131867 useless extension candidates. Maximal degree in co-relation 702532. Up to 102790 conditions per place. [2023-08-30 06:40:30,262 INFO L137 encePairwiseOnDemand]: 316/325 looper letters, 412 selfloop transitions, 35 changer transitions 0/459 dead transitions. [2023-08-30 06:40:30,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 459 transitions, 4669 flow [2023-08-30 06:40:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 06:40:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 06:40:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2581 transitions. [2023-08-30 06:40:30,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411965811965812 [2023-08-30 06:40:30,266 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2581 transitions. [2023-08-30 06:40:30,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2581 transitions. [2023-08-30 06:40:30,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:30,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2581 transitions. [2023-08-30 06:40:30,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 143.38888888888889) internal successors, (2581), 18 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:30,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:30,272 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:30,273 INFO L175 Difference]: Start difference. First operand has 194 places, 138 transitions, 1339 flow. Second operand 18 states and 2581 transitions. [2023-08-30 06:40:30,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 459 transitions, 4669 flow [2023-08-30 06:40:34,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 459 transitions, 4412 flow, removed 117 selfloop flow, removed 8 redundant places. [2023-08-30 06:40:34,782 INFO L231 Difference]: Finished difference. Result has 209 places, 154 transitions, 1551 flow [2023-08-30 06:40:34,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1551, PETRI_PLACES=209, PETRI_TRANSITIONS=154} [2023-08-30 06:40:34,783 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2023-08-30 06:40:34,783 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 154 transitions, 1551 flow [2023-08-30 06:40:34,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 132.41176470588235) internal successors, (2251), 17 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:34,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:34,784 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-08-30 06:40:34,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 06:40:34,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:34,985 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:40:34,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:34,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1278902246, now seen corresponding path program 4 times [2023-08-30 06:40:34,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:34,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340561665] [2023-08-30 06:40:34,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:40:34,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:34,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:34,989 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:34,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 06:40:35,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:40:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:40:35,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:40:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:35,185 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:40:35,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:40:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:40:35,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:40:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:40:36,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:36,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340561665] [2023-08-30 06:40:36,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340561665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:40:36,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:40:36,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 06:40:36,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884391205] [2023-08-30 06:40:36,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:40:36,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:40:36,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:40:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:40:41,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 325 [2023-08-30 06:40:41,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 154 transitions, 1551 flow. Second operand has 16 states, 16 states have (on average 134.25) internal successors, (2148), 16 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:41,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:41,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 325 [2023-08-30 06:40:41,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:41:35,288 INFO L130 PetriNetUnfolder]: 181718/248622 cut-off events. [2023-08-30 06:41:35,289 INFO L131 PetriNetUnfolder]: For 3179601/3223940 co-relation queries the response was YES. [2023-08-30 06:41:39,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1477904 conditions, 248622 events. 181718/248622 cut-off events. For 3179601/3223940 co-relation queries the response was YES. Maximal size of possible extension queue 5742. Compared 1834813 event pairs, 10288 based on Foata normal form. 37218/285506 useless extension candidates. Maximal degree in co-relation 1477823. Up to 62627 conditions per place. [2023-08-30 06:41:40,704 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 510 selfloop transitions, 46 changer transitions 0/566 dead transitions. [2023-08-30 06:41:40,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 566 transitions, 6572 flow [2023-08-30 06:41:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 06:41:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 06:41:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2078 transitions. [2023-08-30 06:41:40,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567032967032967 [2023-08-30 06:41:40,707 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2078 transitions. [2023-08-30 06:41:40,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2078 transitions. [2023-08-30 06:41:40,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:41:40,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2078 transitions. [2023-08-30 06:41:40,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 148.42857142857142) internal successors, (2078), 14 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:40,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:40,712 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:40,712 INFO L175 Difference]: Start difference. First operand has 209 places, 154 transitions, 1551 flow. Second operand 14 states and 2078 transitions. [2023-08-30 06:41:40,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 566 transitions, 6572 flow [2023-08-30 06:41:52,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 566 transitions, 6479 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-08-30 06:41:52,131 INFO L231 Difference]: Finished difference. Result has 225 places, 162 transitions, 1751 flow [2023-08-30 06:41:52,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1751, PETRI_PLACES=225, PETRI_TRANSITIONS=162} [2023-08-30 06:41:52,132 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 174 predicate places. [2023-08-30 06:41:52,132 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 162 transitions, 1751 flow [2023-08-30 06:41:52,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 134.25) internal successors, (2148), 16 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:52,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:41:52,133 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:41:52,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 06:41:52,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:52,333 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:41:52,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:41:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash -888232234, now seen corresponding path program 2 times [2023-08-30 06:41:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:41:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216673920] [2023-08-30 06:41:52,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:41:52,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:52,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:41:52,335 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:41:52,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 06:41:52,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:41:52,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:41:52,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:41:52,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:41:52,533 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:41:52,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:41:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:41:52,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:41:52,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:41:52,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216673920] [2023-08-30 06:41:52,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216673920] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:41:52,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:41:52,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:41:52,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320197140] [2023-08-30 06:41:52,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:41:52,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:41:52,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:41:52,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:41:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:41:53,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 325 [2023-08-30 06:41:53,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 162 transitions, 1751 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:53,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:53,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 325 [2023-08-30 06:41:53,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:29,635 INFO L130 PetriNetUnfolder]: 132946/188244 cut-off events. [2023-08-30 06:42:29,636 INFO L131 PetriNetUnfolder]: For 2191848/2217500 co-relation queries the response was YES. [2023-08-30 06:42:33,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1090818 conditions, 188244 events. 132946/188244 cut-off events. For 2191848/2217500 co-relation queries the response was YES. Maximal size of possible extension queue 3502. Compared 1366449 event pairs, 30532 based on Foata normal form. 32255/219507 useless extension candidates. Maximal degree in co-relation 1090729. Up to 127672 conditions per place. [2023-08-30 06:42:34,505 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 206 selfloop transitions, 16 changer transitions 0/232 dead transitions. [2023-08-30 06:42:34,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 232 transitions, 3038 flow [2023-08-30 06:42:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:42:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:42:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 702 transitions. [2023-08-30 06:42:34,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432 [2023-08-30 06:42:34,507 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 702 transitions. [2023-08-30 06:42:34,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 702 transitions. [2023-08-30 06:42:34,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:34,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 702 transitions. [2023-08-30 06:42:34,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:34,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:34,509 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:34,509 INFO L175 Difference]: Start difference. First operand has 225 places, 162 transitions, 1751 flow. Second operand 5 states and 702 transitions. [2023-08-30 06:42:34,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 232 transitions, 3038 flow [2023-08-30 06:43:03,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 232 transitions, 2858 flow, removed 38 selfloop flow, removed 9 redundant places. [2023-08-30 06:43:03,369 INFO L231 Difference]: Finished difference. Result has 219 places, 161 transitions, 1667 flow [2023-08-30 06:43:03,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1667, PETRI_PLACES=219, PETRI_TRANSITIONS=161} [2023-08-30 06:43:03,369 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 168 predicate places. [2023-08-30 06:43:03,369 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 161 transitions, 1667 flow [2023-08-30 06:43:03,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:03,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:03,370 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:03,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 06:43:03,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:03,570 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 06:43:03,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1500945633, now seen corresponding path program 3 times [2023-08-30 06:43:03,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:03,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685600220] [2023-08-30 06:43:03,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:43:03,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:03,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:03,572 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:43:03,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 06:43:03,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 06:43:03,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:43:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:43:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:03,910 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:43:03,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:43:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:43:04,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:43:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:43:05,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:05,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685600220] [2023-08-30 06:43:05,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685600220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:43:05,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:43:05,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2023-08-30 06:43:05,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772360269] [2023-08-30 06:43:05,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:43:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 06:43:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 06:43:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-30 06:43:17,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 325 [2023-08-30 06:43:17,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 161 transitions, 1667 flow. Second operand has 20 states, 20 states have (on average 131.4) internal successors, (2628), 20 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:17,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 325 [2023-08-30 06:43:17,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand